Resumen:

We show, to our knowledge, the broadest VCSEL-based optical frequency comb of 1THz in 20dB span, with 193teeth, obtained by cascading two expansion stages, one with two EO Modulators and the second based on HNLFWe show, to our knowledge, the broadest VCSEL-based optical frequency comb of 1THz in 20dB span, with 193teeth, obtained by cascading two expansion stages, one with two EO Modulators and the second based on HNLF[+][-]